Bunch of tweaks

General
1

As always ymmv…

I found this a while back and has a lot of unique things…

I use the kernel parameters on many machines…

cat /proc/cmdline
initrd=\initramfs-linux-cachyos.img root=PARTUUID=8<-- SNIP >8 rw zswap.enabled=0 nowatchdog splash intel_idle.max_cstate=1 cryptomgr.notests initcall_debug intel_iommu=igfx_off no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 tsc=reliable mitigations=off

head /etc/sdboot-manage.conf
# config file for sdboot-manage

# kernel options to be appended to the "options" line
LINUX_OPTIONS="zswap.enabled=0 nowatchdog splash intel_idle.max_cstate=1 cryptomgr.notests initcall_debug intel_iommu=igfx_off no_timer_check noreplace-smp page_alloc.shuffle=1 rcupdate.rcu_expedited=1 tsc=reliable mitigations=off"
#LINUX_FALLBACK_OPTIONS=""

sdboot-manage gen

then reboot…

again, ymmv

2

Top @mostlyharmless

3

I would not really suggest disabling mitigations at all. On some CPU’s which are affected from heavy mitigations like GDS or retbleed, you can disable these manually, instead of disabling all of them.

Spectre is known, how it can be easily used for bad things, so therefore I wouldnt disable them.

4

Also, if you have the latest and greatest AMD CPUs, disabling mitigations will yield no gains at all - https://www.phoronix.com/review/amd-zen5-mitigations-off